CN105958800A - Waterproof seal cover, waterproof sealing installation structure with waterproof seal cover, and frequency transformer - Google Patents

Abstract

The invention provides a waterproof sealing sleeve, a waterproof sealing installation structure thereof, and a frequency converter. The waterproof sealing cover includes: a sealing cover body; an external sealing structure, the external sealing structure is arranged on the outer wall of the sealing cover body, and the external sealing structure is used to abut against the casing of the frequency converter to form a seal; an internal sealing structure, the internal sealing structure It is arranged on the inner wall of the sealing sleeve body, and the internal sealing structure is used to abut against the electrolytic capacitor of the frequency converter to form a seal; the end sealing structure is arranged on the end surface of the first end of the sealing sleeve body, and the end portion The sealing structure is used to abut against the PCB circuit board of the frequency converter to form a seal. The application of the technical scheme of the present invention solves the problems in the prior art that the electrolytic capacitor of the frequency converter has poor waterproof sealing effect, and the heat generated by the electrolytic capacitor inside the frequency converter will shorten the service life of the frequency converter.

Description

Waterproof sealing sleeve and its waterproof sealing installation structure, frequency converter

technical field

The invention relates to the technical field of waterproof sealing, in particular to a waterproof sealing sleeve, a waterproof sealing installation structure thereof, and a frequency converter.

Background technique

Inverter is a kind of power control equipment commonly used in modern times. With the continuous improvement of industrial automation, frequency converters have also been more and more widely used. When it is used in harsh environments such as textiles, ceramics, cement, stone, printing and dyeing, etc., there will be greater problems.

The electrolytic capacitors of frequency converters in the prior art are mostly exposed in the air duct. After a period of use, corrosive gases, water vapor, dust, etc. will not only corrode the electrolytic capacitors, but also enter the equipment through the gap between the electrolytic capacitors and the housing. Internally, the PCB board and electronic components inside the inverter will be corroded, or dust will accumulate between the components, resulting in arc phenomenon or short circuit, which will greatly affect the performance of the inverter and drastically reduce its service life.

There are two main forms of optimization of the existing frequency converter for the location of the electrolytic capacitor;

1. The electrolytic capacitor is placed in the air duct, and the shell is made of an electrolytic capacitor clamp. In order to ensure that the electrolytic capacitor is firmly fixed, an opening is opened on the electrolytic capacitor clamp to ensure a suitable amount of interference. Although this method improves the sealing effect between the electrolytic capacitor and the inverter case, and can partially isolate dust, it does not fundamentally solve the problem. Water vapor, corrosive gas, and some dust can still enter the interior of the equipment through the gap, causing faults such as arc ignition. In addition, it is necessary to add a clamp feature to the shell, which increases the difficulty of mold making, increases the cost of parts, and has low versatility.

2. Place the electrolytic capacitor inside the inverter. This method can solve the problem of dust and gas entering the interior of the equipment, but this will increase the overall size of the equipment and increase the cost of packaging, storage, and logistics. At the same time, during the operation of the equipment, the electrolytic capacitor generates heat, which will increase the temperature inside the equipment and shorten the service life of the electrolytic capacitor itself and other components inside the equipment.

To sum up, the electrolytic capacitor of the frequency converter in the prior art has poor waterproof sealing effect, and the heat generated by the electrolytic capacitor inside the frequency converter will shorten the service life of the frequency converter.

Contents of the invention

The object of the present invention is to provide a waterproof sealing sleeve and its waterproof sealing installation structure, frequency converter, aiming to solve the problem of poor waterproof sealing effect of the electrolytic capacitor of the frequency converter in the prior art, and the problem of the electrolytic capacitor located inside the frequency converter. Heat generation will shorten the service life of the inverter equipment.

In order to solve the above technical problems, the technical solution of the present invention is to provide a waterproof sealing sleeve, including: a sealing sleeve body; an external sealing structure, the external sealing structure is arranged on the outer wall of the sealing sleeve body, and the external sealing structure is used to communicate with the frequency converter The shells of the inverter are abutted to form a seal; the internal sealing structure is arranged on the inner wall of the sealing sleeve body, and the internal sealing structure is used to abut against the electrolytic capacitor of the frequency converter to form a seal; the end sealing structure, the end sealing The structure is arranged on the end surface of the first end of the sealing sleeve body, and the end sealing structure is used to abut against the PCB circuit board of the frequency converter to form a seal.

Optionally, the outer sealing structure includes a serrated sealing portion and an inner ring protrusion, both of which are arranged at intervals, and the serrated sealing portion is disposed on the inner wall of the second end of the sealing sleeve body.

Optionally, the wall thickness of the first end of the sealing sleeve body is greater than the wall thickness of the second end of the sealing sleeve body, and the outer contour shape of the sealing sleeve body is gradually reduced from the first end to the second end.

Optionally, the external sealing structure includes an outer ring protrusion and an outer buckle ear, which are arranged at intervals. The body snaps together to form a seal.

Optionally, the outer buckle ear includes a connection section and a fastening section, one end of the connection section is connected to the outer wall of the gland body, the other end of the connection section is connected to the buckle section, and the connection section, the buckle section and the gland body A groove for clamping with the casing of the frequency converter is formed between the three.

Optionally, an annular concave groove is formed on the outer wall of the sealing sleeve body, and the annular concave groove is located between the end sealing structure and the outer buckle ear.

Optionally, the end sealing structure is a zigzag structure provided on the first end face of the sealing sleeve body.

According to another aspect of the present invention, a waterproof and sealed installation structure is provided, the waterproof and sealed installation structure includes an electrolytic capacitor, a housing and a waterproof sealing sleeve, the electrolytic capacitor passes through the housing, and the waterproof sealing sleeve is sleeved on the electrolytic capacitor, and It is located between the electrolytic capacitor and the casing to form a seal, and the waterproof sealing sleeve is the aforementioned waterproof sealing sleeve.

Optionally, the waterproof sealing installation structure also includes a PCB circuit board, the PCB circuit board is arranged in the housing, the electrolytic capacitor is electrically connected to the PCB circuit board, and the end sealing structure of the waterproof sealing sleeve abuts against the PCB circuit board to form a seal .

According to still another aspect of the present invention, a frequency converter is provided, which has the aforementioned waterproof and sealed installation structure.

In the present invention, the outer sealing structure, the inner sealing structure and the end sealing structure arranged on the sealing sleeve body respectively form a multi-level sealing fit with the corresponding matching positions, and the multi-level sealing combination is used to achieve good waterproof, Sealing effect, thereby solving the problem that the electrolytic capacitor of the frequency converter has poor waterproof sealing effect in the prior art, and the heat generated by the electrolytic capacitor inside the frequency converter will shorten the service life of the frequency converter.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the embodiment of waterproof sealing sleeve of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of an embodiment of the waterproof sealing installation structure of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It should be noted that when an element is referred to as being “fixed” or “disposed on” another element, it may be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

It should also be noted that the orientation terms such as left, right, up, and down in this embodiment are only relative concepts or refer to the normal use state of the product, and should not be regarded as limiting.

As shown in Figure 1, the waterproof sealing sleeve of this embodiment includes a sealing sleeve body 10, an outer sealing structure 20, an inner sealing structure 30 and an end sealing structure 40, the outer sealing structure 20 is arranged on the outer wall of the sealing sleeve body 10, and the outer The sealing structure 20 is used to abut against the casing 2 of the frequency converter to form a seal, and the internal sealing structure 30 is arranged on the inner wall of the sealing sleeve body 10, and the internal sealing structure 30 is used to abut against the electrolytic capacitor 1 of the frequency converter to form a seal , the end sealing structure 40 is disposed on the end surface of the first end of the sealing sleeve body 10 , and the end sealing structure 40 is used to abut against the PCB circuit board 4 of the frequency converter to form a seal.

The outer sealing structure 20, the inner sealing structure 30 and the end sealing structure 40 arranged on the sealing sleeve body 10 respectively form a multi-level sealing fit with the corresponding matching positions, and the multi-level sealing combination can achieve good waterproof, Sealing effect, thereby solving the problem that the electrolytic capacitor of the frequency converter has poor waterproof sealing effect in the prior art, and the heat generated by the electrolytic capacitor inside the frequency converter will shorten the service life of the frequency converter.

In the waterproof sealing sleeve of this embodiment, the external sealing structure 20 includes a serrated sealing portion 31 and an inner ring protrusion 34 , which are arranged at intervals, and the serrated sealing portion 31 is arranged on the inner wall of the second end of the sealing sleeve body 10 , Two waterproof and airtight defense lines close to the inner side of the electrolytic capacitor 1 are formed by cooperating with the electrolytic capacitor 1 at the same time by the serrated sealing portion 31 and the inner ring protrusion 34 . And, the outer sealing structure 30 includes an outer ring protrusion 32 and an outer buckle ear 33, both of which are arranged at intervals, the outer ring protrusion 32 is arranged on the outer wall of the second end of the sealing sleeve body 10, and the outer buckle ear 33 is used for The shells of the frequency converter are interlocked to form a seal, and then through the cooperation between the outer ring protrusion 32 and the outer buckle ear 33 and the shell 2 of the frequency converter, the outer waterproof corresponding to the two inner waterproof sealing lines is formed. , Sealed line of defense. In the outer waterproof and sealing defense line, the outer buckle ear 33 includes a connecting section 331 and a buckling section 332. One end of the connecting section 331 is connected to the outer wall of the sealing sleeve body 10, and the other end of the connecting section 331 is connected to the buckling section 332. Moreover, a groove for engaging with the corresponding edge of the inverter housing 2 is formed between the connecting section 331 , the fastening section 332 and the sealing sleeve body 10 . In this way, a labyrinth-type waterproof and sealed structure is formed between the outer buckle ear 33 and the housing 2, making it difficult for water vapor and dust to enter the electrolytic capacitor 1 and cause corrosion damage, which protects the integrity of the electrolytic capacitor 1 and improves the electrolytic capacitor 1. Weather resistance of capacitor 1.

Referring to Fig. 1 and Fig. 2 together, in the process of installing the waterproof sealing sleeve on the electrolytic capacitor 1 of the frequency converter, in order to make the installation convenient and fast, the wall thickness of the first end of the sealing sleeve body 10 is larger than that of the sealing The wall of the second end of the sleeve body 10 is thick, and the outer contour shape of the sealing sleeve body 10 is gradually reduced from the first end to the second end. In this embodiment, the inner diameter of the waterproof sealing sleeve is equal to the outer diameter of the electrolytic capacitor 1, and then the outer contour shape of the waterproof sealing sleeve is designed as a slope to ensure easy installation and to match the electrolytic capacitor on the housing 2. The ring 21 and the sealing boss 22 on the shell through the outer buckle ear 33 cooperate, so that the waterproof sealing sleeve can be convenient and easy to install, and can realize reliable waterproof and sealing effects.

In addition to the inner two waterproof sealing defense lines and the outer two waterproof sealing defense lines relative to the electrolytic capacitor 1, the waterproof sealing sleeve of this embodiment is also provided with a fifth waterproof sealing defense line, that is, through the end sealing structure 40 and the PCB circuit board 4 The waterproof and airtight defense line formed by cooperation between them. In the fifth waterproof sealing line of defense, the end sealing structure 40 is a zigzag structure provided on the first end face of the sealing sleeve body 10. When the PCB circuit board 4 is assembled downward, the PCB circuit board 4 is pressed against the zigzag structure. Shaped structure, so that the zigzag structure on the first end surface of the sealing sleeve body 10 is deformed, so as to realize the sealing between the sealing sleeve body 10 and the PCB circuit board 4 .

In the process that the PCB circuit board 4 is pressed to the first end face of the sealing sleeve body 10, the sealing sleeve body 10 is subjected to a force, so the sealing sleeve body 10 itself will also be deformed, in order to ensure that the first end face of the sealing sleeve body 10 The zigzag structure on the top has sufficient outward displacement, so the outer wall of the sealing sleeve body 10 has an annular concave groove 35, and the annular concave groove 35 is located between the end sealing structure 40 and the outer buckle ear 33, through the annular The structure of the recessed groove 35 can produce a more obvious elastic effect when the sealing sleeve body 10 itself is deformed, so the sealing effect of the end sealing structure 40 is more reliable.

According to another aspect of the present invention, a waterproof sealing installation structure is provided. As shown in Figure 2, specifically, the waterproof and sealed installation structure includes an electrolytic capacitor 1, a housing 2 and a waterproof sealing sleeve, which is characterized in that the electrolytic capacitor 1 passes through the housing 2, and the waterproof sealing sleeve is sleeved on the electrolytic capacitor 1, And it is located between the electrolytic capacitor 1 and the casing 2 to form a seal, and the waterproof sealing sleeve is the aforementioned waterproof sealing sleeve. Further, the waterproof sealing installation structure also includes a PCB circuit board 4, the PCB circuit board 4 is arranged in the housing 2, the electrolytic capacitor 1 is electrically connected to the PCB circuit board 4, and the end sealing structure 40 of the waterproof sealing sleeve abuts against the A seal has been formed on the PCB circuit board 4 . The above-mentioned waterproof sealing sleeve and corresponding parts are used to form five waterproof and sealing lines of defense, so as to achieve a reliable and stable waterproof sealing effect.

According to yet another aspect of the present invention, a frequency converter is provided, which has the above-mentioned waterproof and sealed installation structure.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention. Inside.

Claims (10)

1. a waterproof gland cover, it is characterised in that including:

Sealing shroud body (10)；

Outer seal structure (20), described outer seal structure (20) is arranged on described sealing shroud body (10) Outer wall on, described outer seal structure (20) is for abutting against to be formed close with the housing of converter (2) Envelope；

Internal seal structure (30), described internal seal structure (30) is arranged on described sealing shroud body (10) Inwall on, described internal seal structure (30) for the electrolysis condenser (1) of converter abut against with Formed and seal；

End seal structure (40), described end seal structure (40) is arranged on described sealing shroud body (10) The first end end face on, described end seal structure (40) for the PCB (4) of converter Abut against to form sealing.

2. waterproof gland cover as claimed in claim 1, it is characterised in that outer seal structure (20) is wrapped Include serrated seal portion (31) and internal ring is protruding (34), between the two every setting, described serrated seal portion (31) On the inwall of the second end being arranged on described sealing shroud body (10).

3. waterproof gland cover as claimed in claim 2, it is characterised in that described sealing shroud body (10) The wall thickness of the first end more than the wall thickness of the second end of described sealing shroud body (10), and described sealing shroud In by the first end, the outer contoured shape of body (10) thinks that the second end is gradually reduced.

4. waterproof gland cover as claimed in claim 1, it is characterised in that described outer seal structure (30) Including outer toroid protruding (32) and outer buckle ear (33), between the two every setting, described outer toroid is protruding (32) On the outer wall of the second end being arranged on described sealing shroud body (10), described outer buckle ear (33) is used for and institute The housing stating converter is interlockingly connected to form sealing.

5. waterproof gland cover as claimed in claim 4, it is characterised in that described outer buckle ear (33) includes Linkage section (331) and snapping section (332), one end of described linkage section (331) is connected to described sealing shroud On the outer wall of body (10), the other end of described linkage section (331) is connected with described snapping section (332), And described linkage section (331), shape between described snapping section (332) and described sealing shroud body (10) three Become for the groove with housing (2) the phase clamping of converter.

6. waterproof gland cover as claimed in claim 5, it is characterised in that described sealing shroud body (10) Outer wall on have annular recess groove (35), described annular recess groove (35) is positioned at described end seal structure (30) and between described outer buckle ear (33).

7. waterproof gland cover as claimed in claim 1, it is characterised in that described end seal structure (40) For being opened in the zigzag structure on the first end end face of described sealing shroud body (10).

8. a waterproof sealing mounting structure, including electrolysis condenser (1), housing (2) and waterproof sealing Set, it is characterised in that described electrolysis condenser (1) passes described housing (2), described waterproof gland cover It is set on described electrolysis condenser (1), and is positioned at described electrolysis condenser (1) and described housing (2) Between to form sealing, described waterproof gland cover is the waterproof sealing according to any one of claim 1 to 7 Set.

9. waterproof sealing mounting structure as claimed in claim 8, it is characterised in that described waterproof sealing is pacified Assembling structure also includes that PCB (4), described PCB (4) are arranged in described housing (2), Described electrolysis condenser (1) is connected electrically in described PCB (4), the end of described waterproof gland cover Part sealing structure (40) is connected in described PCB (4) form sealing.

10. a converter, it is characterised in that it is waterproof that this converter has described in claim 8 or 9 Sealing installation structure.